387442931 has 2 divisors, whose sum is σ = 387442932. Its totient is φ = 387442930.

The previous prime is 387442877. The next prime is 387442961. The reversal of 387442931 is 139244783.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 387442931 - 2¹⁰ = 387441907 is a prime.

It is a super-2 number, since 2×387442931² = 300224049563741522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (387442961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 193721465 + 193721466.

It is an arithmetic number, because the mean of its divisors is an integer number (193721466).

Almost surely, 2^387442931 is an apocalyptic number.

387442931 is a deficient number, since it is larger than the sum of its proper divisors (1).

387442931 is an equidigital number, since it uses as much as digits as its factorization.

387442931 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152, while the sum is 41.

The square root of 387442931 is about 19683.5700776053. The cubic root of 387442931 is about 729.0140759223.

The spelling of 387442931 in words is "three hundred eighty-seven million, four hundred forty-two thousand, nine hundred thirty-one".